MSU safety switch - Willis out, Williamson dressing

RJ Williamson ,26, of MSU celebrates after intercepting a pass meant for Ryan Reffitt of Air Force on a 3rd and goal at the MSU 10 yard line in the 4th quarter. The Spartan defense held Air Force and its triple option on several occasions to preserve the 35-21 win.(Photo: Kevin W. Fowler / for the Lansing State Journal)Buy Photo

But MSU freshman safety Khari Willis is out for the No. 5 Spartans (11-1, 7-1 Big Ten), who will take on No. 4 Iowa (12-0, 8-0) for the title and an expected College Football Playoff spot. Willis was seen in a walking boot and using crutches at MSU's walk-through Friday.

Meanwhile, MSU senior safety RJ Williamson is dressing for the first time since he had biceps surgery on Oct. 4. There's no word on whether Williamson, a starter before the injury, will actually see the field for the Spartans.

Willis started for three straight games, Oct. 17 at Michigan, Oct. 24 vs. Indiana and Nov. 7 at Nebraska, and he has been working mostly in MSU's nickel defense since then.

Pendleton hurt his left leg in last week's 55-16 win over Penn State and was on crutches in the second half of that game, but he took part in MSU's walk-through Friday. If he can't go or is limited, senior tight end Paul Lang will take over those duties.